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Describe how the average density of matter in the universe affects its ultimate fate?

There are 3 different outcomes for the fate of our universe:if the average density is smaller than what is known as the critical value, then the universe will carry on expanding forever.if the average densit...
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Answered by Rebecca N. • Physics tutor
7891 Views

Solve the quadratic 2x^2+7x+6 by completing the square

All quadratic equations take the general form: ax 2 +bx+c=0 The first step used to comlete the square is to divide the whole equation by the a term, in our case 2 : 1) x 2 +(7/2)x+3=0 We then move our c term...
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Answered by Henry N. • Maths tutor
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What is the subjunctive?

The subjunctive is a mood used in French to express emotions or ideas which are uncertain or subjective. Examples include to express doubt, emotions or will/ wanting.There isn't really an English equivalent ...
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Answered by Madeleine S. • French tutor
3504 Views

How do you use the subjunctive mood?

The subjunctive tense in Spanish can't be thought of like the other tenses (present continuous, perfect etc). It is used to reflect the mood of the speaker. In English, the subjunctive is not that common eg....
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Answered by Vance L. • Spanish tutor
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What is the 'centre of gravity' of an object and how do I calculate it?

The centre of gravity (or centre of mass) of an object is the point through which an object's weight will act through. In other words, the object will always balance around this point. Imagine a square book;...
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Answered by Matthew B. • Physics tutor
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